A TMR Mitigation Method Based on Readback Signal in Bit-Patterned Media Recording

Wiparat BUSYATRAS; Chanon WARISARN; Lin M. M. MYINT; Piya KOVINTAVEWAT

doi:10.1587/transele.E98.C.892

A TMR Mitigation Method Based on Readback Signal in Bit-Patterned Media Recording

Wiparat BUSYATRAS, Chanon WARISARN, Lin M. M. MYINT, Piya KOVINTAVEWAT

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Summary :

Track mis-registration (TMR) is one of the major problems in high-density magnetic recording systems such as bit-patterned media recording (BPMR). In general, TMR results from the misalignment between the center of the read head and that of the main track, which can deteriorate the system performance. Although TMR can be handled by a servo system, this paper proposes a novel method to alleviate the TMR effect, based on the readback signal. Specifically, the readback signal is directly used to estimate a TMR level and is then further processed by the suitable target and equalizer designed for such a TMR level. Simulation results indicate that the proposed method can sufficiently estimate the TMR level and then helps improve the system performance if compared to the conventional receiver that does not employ a TMR mitigation method, especially when an areal density is high and/or a TMR level is large.

Publication: IEICE TRANSACTIONS on Electronics Vol.E98-C No.8 pp.892-898

Publication Date: 2015/08/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E98.C.892

Type of Manuscript: PAPER

Category: Storage Technology

Authors

Wiparat BUSYATRAS
  King Mongkut's Institute of Technology Ladkrabang
Chanon WARISARN
  King Mongkut's Institute of Technology Ladkrabang
Lin M. M. MYINT
  Shinawatra University
Piya KOVINTAVEWAT
  Nakhon Pathom Rajabhat University

Keyword

bit-patterned media recording, estimation method, signal-to-noise ratio, track mis-registration, two-dimensional equalization

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Wiparat BUSYATRAS, Chanon WARISARN, Lin M. M. MYINT, Piya KOVINTAVEWAT, "A TMR Mitigation Method Based on Readback Signal in Bit-Patterned Media Recording" in IEICE TRANSACTIONS on Electronics, vol. E98-C, no. 8, pp. 892-898, August 2015, doi: 10.1587/transele.E98.C.892.
Abstract: Track mis-registration (TMR) is one of the major problems in high-density magnetic recording systems such as bit-patterned media recording (BPMR). In general, TMR results from the misalignment between the center of the read head and that of the main track, which can deteriorate the system performance. Although TMR can be handled by a servo system, this paper proposes a novel method to alleviate the TMR effect, based on the readback signal. Specifically, the readback signal is directly used to estimate a TMR level and is then further processed by the suitable target and equalizer designed for such a TMR level. Simulation results indicate that the proposed method can sufficiently estimate the TMR level and then helps improve the system performance if compared to the conventional receiver that does not employ a TMR mitigation method, especially when an areal density is high and/or a TMR level is large.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E98.C.892/_p

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@ARTICLE{e98-c_8_892,
author={Wiparat BUSYATRAS, Chanon WARISARN, Lin M. M. MYINT, Piya KOVINTAVEWAT, },
journal={IEICE TRANSACTIONS on Electronics},
title={A TMR Mitigation Method Based on Readback Signal in Bit-Patterned Media Recording},
year={2015},
volume={E98-C},
number={8},
pages={892-898},
abstract={Track mis-registration (TMR) is one of the major problems in high-density magnetic recording systems such as bit-patterned media recording (BPMR). In general, TMR results from the misalignment between the center of the read head and that of the main track, which can deteriorate the system performance. Although TMR can be handled by a servo system, this paper proposes a novel method to alleviate the TMR effect, based on the readback signal. Specifically, the readback signal is directly used to estimate a TMR level and is then further processed by the suitable target and equalizer designed for such a TMR level. Simulation results indicate that the proposed method can sufficiently estimate the TMR level and then helps improve the system performance if compared to the conventional receiver that does not employ a TMR mitigation method, especially when an areal density is high and/or a TMR level is large.},
keywords={},
doi={10.1587/transele.E98.C.892},
ISSN={1745-1353},
month={August},}

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TY - JOUR
TI - A TMR Mitigation Method Based on Readback Signal in Bit-Patterned Media Recording
T2 - IEICE TRANSACTIONS on Electronics
SP - 892
EP - 898
AU - Wiparat BUSYATRAS
AU - Chanon WARISARN
AU - Lin M. M. MYINT
AU - Piya KOVINTAVEWAT
PY - 2015
DO - 10.1587/transele.E98.C.892
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E98-C
IS - 8
JA - IEICE TRANSACTIONS on Electronics
Y1 - August 2015
AB - Track mis-registration (TMR) is one of the major problems in high-density magnetic recording systems such as bit-patterned media recording (BPMR). In general, TMR results from the misalignment between the center of the read head and that of the main track, which can deteriorate the system performance. Although TMR can be handled by a servo system, this paper proposes a novel method to alleviate the TMR effect, based on the readback signal. Specifically, the readback signal is directly used to estimate a TMR level and is then further processed by the suitable target and equalizer designed for such a TMR level. Simulation results indicate that the proposed method can sufficiently estimate the TMR level and then helps improve the system performance if compared to the conventional receiver that does not employ a TMR mitigation method, especially when an areal density is high and/or a TMR level is large.
ER -